Ford 1996 Bronco Manual page 296

You may add water by itself only in an
emergency, but you should replace it with a
50/50 or appropriate mixture as soon as
possible.
Have your dealer check the engine cooling
system for leaks if you have to add a quart
(liter) of engine coolant more than once a month.
Checking hoses
Inspect all engine and heater system hoses for
deterioration, leaks and loose clamps before
adding or replacing engine coolant. Make
whatever repairs or replacements that are
necessary using Motorcraft parts or their
equivalents.
Engine coolant drain and flush
To drain your vehicle's engine coolant:
1. Turn off the engine and let it cool. Fully
depressurize the engine cooling system by
covering the radiator cap with a thick cloth
and turning it slowly counterclockwise to the
first stop. Step back while the pressure
releases.
2. Remove the cap.
3. Attach a small hose to the drain tube at the
bottom of the radiator.
4. Let the engine coolant drain into a suitable
container. Disconnect the lower radiator hose
at the radiator connector and drain any
remaining engine coolant into a container.
5. Reconnect the lower radiator hose and close
the radiator drain cock.
Proper procedures for flushing the cooling
system can be found in the Truck Service Manual.
299